function lengthOfLIS(nums: number[]): number {
    let n = nums.length;
    let dp = new Array(n).fill(1);
    for (let i = 0; i < n; i++) {
        for (let j = 0; j < i; j++) {
            if (nums[j] < nums[i]) {
                dp[i] = Math.max(dp[i], dp[j] + 1);
            }
        }
    }
    return Math.max(...dp);
};